Sulfur soap.



252 cowosmous,

TED stra'riis PATENT OFFICE.

TOMOICHIRO TANAKA, OF HONGO-KU, TOKYO, JAPAN.

SULFUR SOAP.

No Drawing.

a sm. ll' quantit'y o Vaseline, the whole be-- ing kneaded togetheraiid'ii ihde into a solid form. The object of the invention is toproduae'a sulfur soap which does not emit the disagreeable smell ofsulfureted hydrogen when using it, and which gives the same beneficialmedicinal efl'ect as that derived from the use of bath water of anatural sulfur spring.

The undermentioned three kinds of materials are used in the preparationof the sulfur soap:

A. A neutral soda soap stock produced by the saponification of 3 partsof cocoanut oil and 7 parts of beef talloW, the soap stoc being cut intothmeets and dried.

B. A neutral soda resin soap prepared from the bst grade of resin isboiled into a concentrated solution, to which is added an equivalentquantity of refined flower of sulfur and well stirred together; thewhole mixture is kept in a melted state at a temperature of above 120centigrade for effecting the thorough mixture of the ingredientsubstances, and afterward cooled down to form a pasty mass.

C. A mixture produced by kneading together 10 parts of sodium perborateand 2 parts of Vaseline, which is melted by the aid of gentle heat justto the degree of melting the Vaseline and is sufiiciently kneadedtogether.

The required sulfur soap is then produced by compounding 10 narts of No.A. preparation with 2 parts of No. B and 1 part of No. C, to which isadded an appropriate amount of perfume for scenting it, and pigments forcoloring the soap. The compounding and kneading of the ingredients isdone by a pair of rollers, and the soap made into a tablet by stampingon the containing mold, in the same manner as in the ordinary process ofmaking soap.

When uslng the soap prepared 1n the Specification of Letters Patent.Patented Sept. 10, 1918.

Application filed April 16, 1918. Serial No. 228,825.

above way with warm water the sulfur contained in it in the minuteststate of division intimately mixes with the lather produced by the soapand exerts an action like that possessed by sulfur in a colloidal state.This sulfur unites chemically with the caustic soda produced by thehydrolytic action of the water upon the fatty compounds of the soap,forming sulfid of sodium to some ex tent, and the whole gives the samebeneficial medicinal effect to the users of the soap as that obtainedfrom the use of water ofa natural sulfur spring.

A part of the sodium sulfid produced in the above way would reactchemically with the organic acids and acid salts produced also by thedecomposition of the-substance of the soap. Sulfureted hydrogen, whichmight possibly be produced under the above mentioned conditions,difiuses into the soap lather; perborate of sodium, originally protectedfrom the action of water, by the enveloping action of the Vaselinecontained in the soap gradually mingles with the water and producesperoxid of hydrogen. Furthermore this peroxid of hydrogen splits up,generating free oxygen. The oxygen in an active free state produced bysubsequent decomposition, together with a sort of catalytic oxidizingaction of the resin soap, changes the sulfureted hydrogen into freesulfur; in this way the evolution of the disagreeable odors producedfrom sulfureted hydrogen is entirely obviated.

The proportion above given of the various ingredient substances forproducing the sulfur soap is one example of the process, and may bevaried according to circumstances; also perborate of sodium in the aboverecipe may be replaced by other salt compounds which have the power ofliberating active oxygen.

Claims:

1. A process of producing soap, which consists in mixing a soap stockwith a soda resin and sulfur soap, and incorporating with the mixtureVaseline and a chemical which liberates oxygen when mixed with water.

2. A process of producing soap, which consists in mixing a soap stockwith a soda resin soap and refined flowers of sulfur, and incorporatingthe mixture with sodium perborate and Vaseline.

3. A process of producing soap, which consists in mixing a neutral soapstock with arner;

r r l a neutral soda resin soap and refined flowers of sulfur, andincorporating the mixture with sodium perborate and Vaseline.

4. A process of producing soap, which consists in mixing a neutral soapstock with a neutral soda resin soap and refined flowers of sulfur, andincorporating the mixture with sodium perborate and Vaseline, all in theproportions specified.

5. A process of making soap, which consists in mixing a neutral soapstock containand incorporating the mixture with sodium 13 perborate andVaseline.

In testimony whereof I have signed my name to this specification.

TOMOICHIRO TANAKA.

Copies of this patent may be obtained for live cents each, by addressingthe Commissioner of Patents, Washington, D. O.

